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About This Item

 

Full Description

1.1 This practice covers a guide for metal finishers to clean and then provide a paint base for the finishing of magnesium and magnesium alloys using chemical conversion coatings. Where applicable (for example, aerospace) secondary supplementary coatings (for example, surface sealing) can be used (see Appendix X1).

1.2 Although primarily intended as a base for paint, chemical conversion coatings provide varying degrees of surface protection for magnesium parts exposed to indoor atmosphere either in storage or in service under mild exposure conditions. An example is the extensive use of the dichromate treatment (see 5.2) as a final coating for machined surfaces of die cast magnesium components in the computer industry.

1.3 The traditional numbering of the coating is used throughout.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

 

Document History

  1. ASTM B879-17

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    Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys

    • Most Recent
  2. ASTM B879-97(2013)


    Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys

    • Historical Version
  3. ASTM B879-97(2008)e1


    Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys

    • Historical Version
  4. ASTM B879-97(2003)e1


    Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys

    • Historical Version
  5. ASTM B879-97


    Standard Practice for Applying Non-Electrolytic Conversion Coatings on Magnesium and Magnesium Alloys

    • Historical Version